A CASE OF ANAPHYLAXIS DUE TO ROSE-FLAVORED SOFT-SERVE ICE CREAM WITH POLLEN FOOD ALLERGY SYNDROME

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  • Kitabayashi Taeru
    Division of Pediatrics, Sanno Hospital:Clinical research Centers for Medicine, International University of Health and Welfare
  • Sato Sayuri
    Division of Dermatology, Sanno Hospital
  • Adachi Mitsuru
    Division of Allergic Medicine, Sanno Hospital:Clinical research Centers for Medicine, International University of Health and Welfare

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Other Title
  • バラのソフトクリームでアナフィラキシーを呈したPollen Food Allergy Syndromeの1例
  • 症例報告 バラのソフトクリームでアナフィラキシーを呈したPollen Food Allergy Syndromeの1例
  • ショウレイ ホウコク バラ ノ ソフトクリーム デ アナフィラキシー オ テイシタ Pollen Food Allergy Syndrome ノ 1レイ

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Abstract

We experienced a 10-year-old boy who had anaphylaxis after eating rose-flavored soft-serve ice cream. The patient felt a sense of discomfort in his throat when eating apple, peach, loquat, Japanese pear, and kiwi fruit. Therefore, we measured specific IgE antibodies to allergen components by ImmunoCAP ISAC. Consequently, the patient gave positive results for all PR-10 proteins from birch, alder, hazel, apple, peach, peanut, hazelnut, and soybean, so we diagnosed him with Pollen Food Allergy Syndrome (PFAS) induced by cross reactivity with pollens of birch family and fruits of rose family. When we conducted the skin prick test as is for red rose syrup because of the belief that anaphylaxis was caused by the rose ingredient contained in rose-flavored soft-serve ice cream, the patient gave a strong positive result. However, the results were negative for rose essence and Food Red No. 2 contained. Subsequently, it was found that red rose syrup contained apple juice. Therefore, we conducted the prick-prick test for apple, and the patient was confirmed to be strongly positive to apple. We thus identified apple as the cause of anaphylaxis. Since there is no legal obligation of labeling specific raw materials when directly selling manufactured and processed food products to general consumers, it is possible for general consumers to mistakenly take them in without knowing the containment of allergic substances. It is believed that the labeling method should be improved in the future.

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